Edelbrock 608915 Details

Designed for non-emissions 302, 327, 350 and 400 c.i.d. engines up to 1986, these heads made 420 horsepower with the Performer RPM Power Package for small-block Chevys. Hardened pushrods are required.

Installation Notes: When using stock rockers on SB-Chevy Performer & Performer RPM heads, .100'' longer than stock pushrods are required. Due to valve-to-cylinder bore interference, SB-Chevy heads may not be used on engines with less than 4'' bore (262, 265, 283, 305, 307 c.i.d.) except with camshafts having less than .450'' valve lift.

Tech Tip: To gain more spark plug clearance, Edelbrock recommends using Champion RC Series plugs such as the RC12YC (P/N 192-49776). They are 0.230'' shorter than a conventional spark plug and have a 5/8'' hex for easier access.

Edelbrock Performer RPM Small Block Cylinder HeadsThe Performer RPM Small Block aluminum cylinder heads are designed for Small Block Chevy 302, 327, 350 and 400ci engines up to 1986. These heads feature 195cc intake ports and 65cc exhaust ports with 2.02" intake and 1.60" exhaust valves and 1.46" valve springs that allow a .575" maximum lift. To use stock rockers on the Performer RPM, .100" longer than stock pushrods are required. Made In The USA!